The ongoing COVID-19 pandemic has impacted the entire globe on all fronts,and vector-borne diseases are not an exception.There are certain similarities between dengue and COVID-19 since both diseases are positive-sens...The ongoing COVID-19 pandemic has impacted the entire globe on all fronts,and vector-borne diseases are not an exception.There are certain similarities between dengue and COVID-19 since both diseases are positive-sense single-stranded RNA virus and have animal origin linkages.Interestingly,both the diseases present over 80%asymptomatic cases.Dengue is the most prevalent and fast-emerging viral infection worldwide.The dengue virus(DENV)has four serotypes,namely DENV-1,DENV-2,DENV-3 and DENV-4,and it is possible that the same person can be infected four times before full immunity is established[1];whereas,COVID-19 is an air-borne respiratory disease caused by the severe acute respiratory syndrome coronavirus 2,and several variants have emerged over time.In late 2020,the variants posed an increased risk to global public health emergency,which prompted the characterisation of specific Variants of Interest and Variants of Concern to mitigate the COVID-19 pandemic[2].DENV is transmitted by several species of day-biting Aedes mosquitoes.They are highly adaptive and invasive species and are predominantly found in the tropical and subtropical regions.In recent decades,these mosquitoes have been discovered in all continents except Antarctica.Aedes aegypti and Aedes albopictus are two major vectors of dengue.This means wherever these mosquitoes make their footprints,dengue creeps in.展开更多
Investigations on malaria outbreaks and role of sibling species complex of principal rural malaria vector Anopheles culicifacies were carried out in villages in north Karnataka, India from 1997 through 2014. Informati...Investigations on malaria outbreaks and role of sibling species complex of principal rural malaria vector Anopheles culicifacies were carried out in villages in north Karnataka, India from 1997 through 2014. Information regarding densities, resting and breeding habitats of malaria vectors prevalent in the area was also generated so as to formulate an appropriate vector control strategy. The Slide Positivity Rate (SPR), Slide Falciparum Rate (SFR) and Pf proportion was 43.1%, 35.9% and 83.3%, respectively. Three sibling species A, B, and C of An. culicifacies were found sympatric with cumulative percent composition of 63.7, 28.2 and 8.1, respectively. Per man hour and per structure densities of An. culicifacies, An. culicifacies and An. culicifacies varied from 0 to 27.5 and 0 to 56.0, 0 to 0.5 and 0 to 7.0 and, 0 to 2.5 and 0 to 7.5, respectively. The proportion of semi-gravid and gravid females was more as compared to fully fed and unfed females which indicated that most of the females rested indoor. Streams/river, wells, seepages and irrigation tanks are the major habitats supporting breeding of An. culicifacies. Integrated vector managements by indoor residual spraying of effective insecticide as per national guidelines along with biological control methods especially use of larvivorous fish Gambusia affinis and Poecilia reticulate are suggested to control malaria in the area.展开更多
文摘The ongoing COVID-19 pandemic has impacted the entire globe on all fronts,and vector-borne diseases are not an exception.There are certain similarities between dengue and COVID-19 since both diseases are positive-sense single-stranded RNA virus and have animal origin linkages.Interestingly,both the diseases present over 80%asymptomatic cases.Dengue is the most prevalent and fast-emerging viral infection worldwide.The dengue virus(DENV)has four serotypes,namely DENV-1,DENV-2,DENV-3 and DENV-4,and it is possible that the same person can be infected four times before full immunity is established[1];whereas,COVID-19 is an air-borne respiratory disease caused by the severe acute respiratory syndrome coronavirus 2,and several variants have emerged over time.In late 2020,the variants posed an increased risk to global public health emergency,which prompted the characterisation of specific Variants of Interest and Variants of Concern to mitigate the COVID-19 pandemic[2].DENV is transmitted by several species of day-biting Aedes mosquitoes.They are highly adaptive and invasive species and are predominantly found in the tropical and subtropical regions.In recent decades,these mosquitoes have been discovered in all continents except Antarctica.Aedes aegypti and Aedes albopictus are two major vectors of dengue.This means wherever these mosquitoes make their footprints,dengue creeps in.
文摘Investigations on malaria outbreaks and role of sibling species complex of principal rural malaria vector Anopheles culicifacies were carried out in villages in north Karnataka, India from 1997 through 2014. Information regarding densities, resting and breeding habitats of malaria vectors prevalent in the area was also generated so as to formulate an appropriate vector control strategy. The Slide Positivity Rate (SPR), Slide Falciparum Rate (SFR) and Pf proportion was 43.1%, 35.9% and 83.3%, respectively. Three sibling species A, B, and C of An. culicifacies were found sympatric with cumulative percent composition of 63.7, 28.2 and 8.1, respectively. Per man hour and per structure densities of An. culicifacies, An. culicifacies and An. culicifacies varied from 0 to 27.5 and 0 to 56.0, 0 to 0.5 and 0 to 7.0 and, 0 to 2.5 and 0 to 7.5, respectively. The proportion of semi-gravid and gravid females was more as compared to fully fed and unfed females which indicated that most of the females rested indoor. Streams/river, wells, seepages and irrigation tanks are the major habitats supporting breeding of An. culicifacies. Integrated vector managements by indoor residual spraying of effective insecticide as per national guidelines along with biological control methods especially use of larvivorous fish Gambusia affinis and Poecilia reticulate are suggested to control malaria in the area.
